jcs.org
Serenity Operating System
1/*
2 * Copyright (c) 2018-2020, Andreas Kling <kling@serenityos.org>
3 *
4 * SPDX-License-Identifier: BSD-2-Clause
5 */
6
7#include <Kernel/CommandLine.h>
8#if ARCH(X86_64)
9# include <Kernel/Arch/x86_64/PCSpeaker.h>
10#endif
11#include <Kernel/Process.h>
12
13namespace Kernel {
14
15ErrorOr<FlatPtr> Process::sys$beep(int tone)
16{
17 VERIFY_NO_PROCESS_BIG_LOCK(this);
18 if (!kernel_command_line().is_pc_speaker_enabled())
19 return ENODEV;
20 if (tone < 20 || tone > 20000)
21 return EINVAL;
22#if ARCH(X86_64)
23 PCSpeaker::tone_on(tone);
24 auto result = Thread::current()->sleep(Time::from_nanoseconds(200'000'000));
25 PCSpeaker::tone_off();
26 if (result.was_interrupted())
27 return EINTR;
28 return 0;
29#else
30 return ENOTIMPL;
31#endif
32}
33
34}